Populate or unpopulate the toolshed and changeset_revision attributes for each of
the following tag sets.
<action type=”set_environment_for_install”>
<action type=”setup_r_environment”>
<action type=”setup_ruby_environment”>

Populate or unpopulate the toolshed and changeset_revision attributes of a
<repository> tag. Populating will occur when a dependency definition file
is being uploaded to the repository, while unpopulating will occur when the
repository is being exported.